CN111511025B - Power control method and terminal equipment - Google Patents

Abstract

The present application provides a power control method and a terminal device, wherein the method includes: the first terminal device determines the transmission power of the data channel; wherein the data channel includes first information, and the first information includes feedback information ; The first terminal device sends the feedback information to the second terminal device at the transmission power of the data channel. Correspondingly, the present application also provides a corresponding device. With this application, the power can be reasonably controlled.

Description

Power control method and terminal equipment

Technical Field

The present application relates to the field of communication technology, and in particular to a power control method and terminal equipment.

Background Art

Under the network of long term evolution (LTE) technology proposed by the 3rd generation partnership project (3GPP), vehicle-to-everything (V2X) vehicle networking technology was proposed. V2X communication refers to the communication between a vehicle and anything in the outside world, including vehicle to vehicle (V2V), vehicle to pedestrian (V2P), vehicle to infrastructure (V2I), and vehicle to network (V2N).

V2X communication is aimed at high-speed equipment represented by vehicles, and is the basic technology and key technology for applications in scenarios with very high communication latency requirements in the future, such as smart cars, autonomous driving, and intelligent transportation systems. Based on V2X communication, vehicle users can send some of their own information, such as location, speed, intention (turning, merging, reversing), and other information periodically and some non-periodic event-triggered information to surrounding vehicle users. Similarly, vehicle users can also receive information from surrounding users in real time.

Among them, the main service type faced by LTE-V2X is broadcast messages, and there is no hybrid automatic repeat request (HARQ) feedback, channel state information (CSI) feedback, etc.

However, the service types in NR-V2X can also be unicast and multicast, etc. Therefore, how to perform power control allocation and power control in NR-V2X needs to be solved urgently.

Summary of the invention

The present application provides a power control method and terminal equipment, which can reasonably control the transmission power of different channels.

In a first aspect, an embodiment of the present application provides a power control method, comprising: a first terminal device determines the transmission power of a data channel; wherein the data channel includes first information, and the first information includes feedback information; the first terminal device sends the feedback information to a second terminal device at the transmission power of the data channel.

In an embodiment of the present application, when the time-frequency domain resources of the data channel and the feedback channel overlap, the feedback information can be sent along with the data channel. Therefore, the embodiment of the present application improves the transmission power of the data channel, making the allocation of the transmission power of the data channel in this case more accurate.

In combination with the first aspect, in a possible implementation method, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel and the first adjustment parameter; or, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.

In an embodiment of the present application, the first adjustment parameter can be understood as a parameter that can adjust the transmission power of the data channel. The first adjustment parameter can be a parameter related to the feedback information. As a result, when allocating the transmission power of the data channel, the terminal device can adjust the transmission power of the data channel according to the actual information transmitted in the data channel, thereby further improving the accuracy of the transmission power of the data channel.

In combination with the first aspect or any possible implementation of the first aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, and the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.

In combination with the first aspect or any possible implementation of the first aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.

In combination with the first aspect or any possible implementation of the first aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the first aspect or any possible implementation of the first aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the first aspect or any possible implementation manner of the first aspect, the reference information includes information related to the distance.

In combination with the first aspect or any possible implementation of the first aspect, the distance-related information includes one or more of the distance information between the first terminal device and the network device, the distance information between the first terminal device and the second terminal device, the communication distance information covered by the first terminal device, and feedback information that the first terminal device is within the coverage range of the network device.

In combination with the first aspect or any possible implementation manner of the first aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX ,f ₁ (M ₁ )+P _O +α×PL+β}

Wherein, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f1 ( _M1 ) is a function of the bandwidth _M1 of the data channel, the _PO is the target receive power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the first aspect or any possible implementation manner of the first aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =f ₂ (M ₁ +M ₂ )+min{P _CMAX ,f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f2 ( _M1 + _M2 ) and the _f3 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the first aspect or any possible implementation manner of the first aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX -f ₄ (M ₁ +M ₂ ),f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f3 ( _M1 + _M2 ) and the _f4 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In the second aspect, an embodiment of the present application also provides a power control method, including: a first terminal device determines the transmission power of a feedback channel; wherein the feedback channel and the data channel have both time domain overlap and frequency domain overlap, or the feedback channel and the data channel have frequency domain overlap but no time domain overlap, or the feedback channel and the data channel have time domain overlap but no frequency domain overlap; the first terminal device sends feedback information to the second terminal device at the transmission power of the feedback channel.

In an embodiment of the present application, the multiplexing method between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), such as the feedback channel may have both time domain overlap and frequency domain overlap with the data channel, the feedback channel may have frequency domain overlap but no time domain overlap with the data channel, and the feedback channel may have time domain overlap but no frequency domain overlap with the data channel. Different multiplexing methods correspond to different transmit powers, so the terminal device can determine the transmit power of the feedback channel according to one of the multiple possibilities, avoiding the use of one method to determine the transmit power of the feedback channel in all cases, thereby effectively improving the accuracy of determining the transmit power of the feedback channel and reasonably controlling the transmit power of the feedback channel.

In combination with the second aspect, in a possible implementation method, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter; or, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.

In the embodiment of the present application, the transmission power of the feedback channel may be determined according to different frame structures.

In combination with the second aspect or any possible implementation manner of the second aspect, the second adjustment parameter is configured by high-layer signaling, or the second adjustment parameter is predefined.

In combination with the second aspect or any possible implementation manner of the second aspect, the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel.

In combination with the second aspect or any possible implementation of the second aspect, the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or the power difference between the feedback channel and the data channel is configured by high-level signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; or the power difference between the feedback channel and the control channel is configured by the high-level signaling.

In combination with the second aspect or any possible implementation of the second aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the second aspect or any possible implementation of the second aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the second aspect or any possible implementation manner of the second aspect, the reference information includes information related to the distance.

In combination with the second aspect or any possible implementation of the second aspect, the distance-related information includes one or more of the distance information between the first terminal device and the network device, the distance information between the first terminal device and the second terminal device, the communication distance information covered by the first terminal device, and feedback information that the first terminal device is within the coverage range of the network device.

In combination with the second aspect or any possible implementation manner of the second aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₅ (M ₁ +M ₃ )+min{P _CMAX ,f ₆ (M ₁ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f5 ( _M1 + _M3 ) and the _f6 ( _M1 + _M3 ) are respectively functions of the bandwidth _M1 of the data channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the data channel, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In combination with the second aspect or any possible implementation manner of the second aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₇ (M ₂ +M ₃ )+min{P _CMAX ,f ₈ (M ₂ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f7 ( _M2 + _M3 ) and the _f8 ( _M2 + _M3 ) are respectively functions of the bandwidth _M2 of the control channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the control channel, the _PO is the target receiving power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In the third aspect, an embodiment of the present application provides a power control device, including: a processing unit, used to determine the transmission power of a data channel; wherein the data channel includes first information, and the first information includes feedback information; a sending unit, used to send the feedback information to a second terminal device at the transmission power of the data channel.

In combination with the third aspect, in one possible implementation, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel and the first adjustment parameter; or, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.

In combination with the third aspect or any possible implementation of the third aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, and the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.

In combination with the third aspect or any possible implementation of the third aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.

In combination with the third aspect or any possible implementation of the third aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the third aspect or any possible implementation of the third aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the third aspect or any possible implementation manner of the third aspect, the reference information includes information related to the distance.

In combination with the third aspect or any possible implementation of the third aspect, the distance-related information includes one or more of the distance information between the first terminal device and the network device, the distance information between the first terminal device and the second terminal device, the communication distance information covered by the first terminal device, and feedback information that the first terminal device is within the coverage range of the network device.

In combination with the third aspect or any possible implementation manner of the third aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX ,f ₁ (M ₁ )+P _O +α×PL+β}

Wherein, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f1 ( _M1 ) is a function of the bandwidth _M1 of the data channel, the _PO is the target receive power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the third aspect or any possible implementation manner of the third aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =f ₂ (M ₁ +M ₂ )+min{P _CMAX ,f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f2 ( _M1 + _M2 ) and the _f3 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the third aspect or any possible implementation manner of the third aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX -f ₄ (M ₁ +M ₂ ),f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f3 ( _M1 + _M2 ) and the _f4 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In a fourth aspect, an embodiment of the present application also provides a power control device, comprising: a processing unit, used to determine the transmission power of a feedback channel; wherein the feedback channel and the data channel have both time domain overlap and frequency domain overlap, or the feedback channel and the data channel have frequency domain overlap but no time domain overlap, or the feedback channel and the data channel have time domain overlap but no frequency domain overlap; a sending unit, used to send feedback information to a second terminal device at the transmission power of the feedback channel.

In combination with the fourth aspect, in a possible implementation method, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter; or, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.

In combination with the fourth aspect or any possible implementation manner of the fourth aspect, the second adjustment parameter is configured by high-layer signaling, or the second adjustment parameter is predefined.

In combination with the fourth aspect or any possible implementation manner of the fourth aspect, the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel.

In combination with the fourth aspect or any possible implementation of the fourth aspect, the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or the power difference between the feedback channel and the data channel is configured by high-level signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; or the power difference between the feedback channel and the control channel is configured by the high-level signaling.

In combination with the fourth aspect or any possible implementation of the fourth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the fourth aspect or any possible implementation of the fourth aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the fourth aspect or any possible implementation manner of the fourth aspect, the reference information includes information related to the distance.

In combination with the fourth aspect or any possible implementation of the fourth aspect, the distance-related information includes one or more of the distance information between the first terminal device and the network device, the distance information between the first terminal device and the second terminal device, the communication distance information covered by the first terminal device, and feedback information that the first terminal device is within the coverage range of the network device.

In combination with the fourth aspect or any possible implementation manner of the fourth aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₅ (M ₁ +M ₃ )+min{P _CMAX ,f ₆ (M ₁ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f5 ( _M1 + _M3 ) and the _f6 ( _M1 + _M3 ) are respectively functions of the bandwidth _M1 of the data channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the data channel, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In combination with the fourth aspect or any possible implementation manner of the fourth aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₇ (M ₂ +M ₃ )+min{P _CMAX ,f ₈ (M ₂ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f7 ( _M2 + _M3 ) and the _f8 ( _M2 + _M3 ) are respectively functions of the bandwidth _M2 of the control channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the control channel, the _PO is the target receiving power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In a fifth aspect, an embodiment of the present application provides a terminal device, which is used as a first terminal device, and the first terminal device includes a processor, a memory and a transceiver, the processor is coupled to the memory, and the processor is used to determine the transmission power of a data channel; wherein the data channel includes first information, and the first information includes feedback information; the transceiver is coupled to the processor, and the transceiver is used to send the feedback information to a second terminal device at the transmission power of the data channel.

In combination with the fifth aspect, in a possible implementation method, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel and the first adjustment parameter; or, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.

In combination with the fifth aspect or any possible implementation of the fifth aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, and the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.

In combination with the fifth aspect or any possible implementation of the fifth aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.

In combination with the fifth aspect or any possible implementation of the fifth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the fifth aspect or any possible implementation of the fifth aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the fifth aspect or any possible implementation manner of the fifth aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX ,f ₁ (M ₁ )+P _O +α×PL+β}

Wherein, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f1 ( _M1 ) is a function of the bandwidth _M1 of the data channel, the _PO is the target receive power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the fifth aspect or any possible implementation manner of the fifth aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =f ₂ (M ₁ +M ₂ )+min{P _CMAX ,f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f2 ( _M1 + _M2 ) and the _f3 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In combination with the fifth aspect or any possible implementation manner of the fifth aspect, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX -f ₄ (M ₁ +M ₂ ),f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the _P1 is the transmit power of the data channel, _{the PCMAX} is the maximum transmit power, the _f3 ( _M1 + _M2 ) and the _f4 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the β is the first adjustment parameter.

In the sixth aspect, an embodiment of the present application also provides a terminal device, which is used as a first terminal device, and the first terminal device includes a processor, a memory and a transceiver, the processor is coupled to the memory, and the processor is used to determine the transmission power of a feedback channel; wherein the feedback channel has both time domain overlap and frequency domain overlap with the data channel, or the feedback channel has frequency domain overlap and no time domain overlap with the data channel, or the feedback channel has time domain overlap and no frequency domain overlap with the data channel; the transceiver is coupled to the processor, and the transceiver is used to send feedback information to the second terminal device at the transmission power of the feedback channel.

In combination with the sixth aspect, in a possible implementation method, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter; or, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.

In combination with the sixth aspect or any possible implementation manner of the sixth aspect, the second adjustment parameter is configured by high-layer signaling, or the second adjustment parameter is predefined.

In combination with the sixth aspect or any possible implementation manner of the sixth aspect, the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel.

In combination with the sixth aspect or any possible implementation of the sixth aspect, the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or the power difference between the feedback channel and the data channel is configured by high-level signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; or the power difference between the feedback channel and the control channel is configured by the high-level signaling.

In combination with the sixth aspect or any possible implementation of the sixth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.

In combination with the sixth aspect or any possible implementation of the sixth aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In combination with the sixth aspect or any possible implementation manner of the sixth aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₅ (M ₁ +M ₃ )+min{P _CMAX ,f ₆ (M ₁ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f5 ( _M1 + _M3 ) and the _f6 ( _M1 + _M3 ) are respectively functions of the bandwidth _M1 of the data channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the data channel, the _PO is the target received power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In combination with the sixth aspect or any possible implementation manner of the sixth aspect, the transmit power of the feedback channel satisfies the following formula:

P ₂ =f ₇ (M ₂ +M ₃ )+min{P _CMAX ,f ₈ (M ₂ +M ₃ )+P _O +α×PL+Δ}

Among them, the _P2 is the transmission power of the feedback channel, _{the PCMAX} is the maximum transmission power, the _f7 ( _M2 + _M3 ) and the _f8 ( _M2 + _M3 ) are respectively functions of the bandwidth _M2 of the control channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the control channel, the _PO is the target receiving power of the second terminal device, the PL is the path loss estimation value, and the Δ is the second adjustment parameter.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer executes the methods described in the above aspects.

In an eighth aspect, an embodiment of the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the methods described in the above aspects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG1b is a schematic diagram of a V2X scenario provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a time-frequency resource provided in an embodiment of the present application;

FIG3 is a schematic diagram of a frame structure provided in an embodiment of the present application;

FIG4a is a schematic diagram of a sidelink scenario provided by an embodiment of the present application;

FIG4b is a schematic diagram of another sidelink scenario provided by an embodiment of the present application;

FIG4c is a schematic diagram of another sidelink scenario provided by an embodiment of the present application;

FIG4d is a schematic diagram of another sidelink scenario provided by an embodiment of the present application;

FIG4e is a schematic diagram of another sidelink scenario provided by an embodiment of the present application;

FIG4f is a schematic diagram of another sidelink scenario provided by an embodiment of the present application;

FIG4g is a schematic diagram of another sidelink scenario provided in an embodiment of the present application;

FIG5 is a schematic flow chart of a power control method provided in an embodiment of the present application;

FIG6 is a schematic flow chart of another power control method provided in an embodiment of the present application;

FIG7 is a schematic diagram of another frame structure provided in an embodiment of the present application;

FIG8 is a schematic diagram of another frame structure provided in an embodiment of the present application;

FIG9 is a schematic diagram of another frame structure provided in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of a power control device provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

The terms "first" and "second" and the like in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and/or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character "/" generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

The communication system used in this application can be understood as a wireless cellular communication system, or as a wireless communication system based on a cellular network architecture. For example, the fifth-generation mobile communication (5th-generation, 5G) system and the next generation of mobile communications, etc. Figure 1a is a schematic diagram of a communication system provided in an embodiment of the present application, and the scheme in this application can be applied to the communication system. The communication system may include at least one network device, only one of which is shown, such as the next generation base station (thenext generation Node B, gNB) in the figure; and one or more terminal devices connected to the network device, such as terminal device 1 and terminal device 2 in the figure.

Among them, the network device can be a device that can communicate with the terminal device. The network device can be any device with wireless transceiver functions, including but not limited to base stations. For example, the base station can be a gNB, or the base station can be a base station in a future communication system. Optionally, the network device can also be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless local area network (wireless fidelity, WiFi) system. Optionally, the network device can also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. Optionally, the network device can also be a wearable device or a vehicle-mounted device, etc. Optionally, the network device can also be a small station, a transmission reference point (TRP), etc. Of course, the present application is not limited to this.

Terminal equipment, also known as user equipment (UE), terminal, etc. Terminal equipment is a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water, such as on ships; it can also be deployed in the air, such as on airplanes, balloons or satellites. Terminal equipment can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

It can be understood that in the communication system shown in Figure 1a, terminal device 1 and terminal device 2 can also communicate through device to device (D2D) technology or vehicle-to-everything (V2X) technology.

Furthermore, V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2I), and vehicle-to-network (V2N). As shown in Figure 1b, Figure 1b shows the V2X scenario. Among them, V2V refers to vehicle-to-vehicle communication based on LTE; V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers) based on LTE; V2I refers to the communication between vehicles and roadside units (RSU) based on LTE. In addition, there is a V2N that can be included in V2I. V2N refers to the communication between vehicles and base stations/networks based on LTE. Among them, roadside units include two types: terminal-type RSU. Since it is arranged on the roadside, the terminal-type RSU is in a non-mobile state and does not need to consider mobility; base station-type RSU can provide timing synchronization and resource scheduling for vehicles communicating with it.

As an example, refer to Figure 2, which is a schematic diagram of the structure of a time-frequency resource provided in an embodiment of the present application, wherein a resource element (RE) is an orthogonal frequency division multiplexing (OFDM) symbol in the time domain and a subcarrier in the frequency domain. In the LTE system, the time-frequency resources are divided into OFDM or single carrier frequency division multiplexing access (SC-FDMA) symbols in the time domain dimension and subcarriers in the frequency domain dimension, and the smallest resource granularity is called RE, which represents a time-frequency grid consisting of a time domain symbol in the time domain and a subcarrier in the frequency domain. It can be understood that the above is only an example provided in an embodiment of the present application. In future communication technologies, the structure of RE may change. Therefore, the RE shown in Figure 2 should not be understood as a limitation on the embodiment of the present application. For example, in 5G NR, a variety of subcarrier spacings are introduced, such as the subcarrier spacing can be 15kHz* ²ⁿ , n is an integer from 3.75, 7.5 to 480kHz, and so on.

In the 3GPP LTE system, the main service type in LTE V2X is broadcast, and there is no hybrid automatic repeat request (HARQ) feedback, channel state information (CSI) feedback, etc. However, the service types in NR V2X also include unicast and multicast, as well as HARQ feedback, and use a separate physical sidelink feedback channel (PSFCH) to carry sidelink feedback control information (SFCI).

Specifically, in the frame structure shown in FIG3 , as shown in 3a and 3b in FIG3 , the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH) are time division multiplexed (TDM). In LTE, in the frame structures shown in 3a and 3b in FIG3 , the transmission powers of PSCCH and PSSCH respectively satisfy the following formulas:

P _PSSCH ＝min{P _CMAX,PSSCH ,10log ₁₀ (M _PSSCH )+P _{O_PSSCH,2} +α _PSSCH,2 ×PL} (1)

P _PSCCH ＝min{P _CMAX,PSCCH ,10log ₁₀ (M _PSCCH )+P _{O_PSCCH,2} +α _PSCCH,2 ×PL} (2)

Among them, P _PSSCH is the transmit power of PSSCH, _PCMAX,PSSCH is the maximum transmit power of PSSCH, M _PSSCH is the bandwidth of PSSCH, _{PO_PSSCH,2} is the target receive power of the terminal device, α _PSSCH,2 is the filter parameter configured by the base station, and PL is the path loss between the base station and the terminal device.

Among them, P _PSCCH is the transmit power of PSCCH, _PCMAX,PSCCH is the maximum transmit power of PSCCH, M _PSCCH is the bandwidth of PSCCH, _{PO_PSCCH,2} is the target receive power of the terminal device, α _PSCCH,2 is the filter parameter configured by the base station, and PL is the path loss between the base station and the terminal device.

As shown in 3c of FIG3 , PSCCH and PSSCH are frequency division multiplexing (FDM). In LTE, in the frame structure shown in 3c of FIG3 , the transmission power of PSCCH and PSSCH can satisfy the following formulas respectively:

Optionally, formula (3) can also be transformed as follows:

Optionally, formula (5) can also be transformed as follows:

Among them, P _PSSCH is the transmit power of PSSCH, P _PSCCH is the transmit power of PSCCH; M _PSSCH is the bandwidth of PSSCH, M _PSCCH is the bandwidth of PSCCH; _PCMAX is the maximum transmit power of the terminal device, which can also be understood as the maximum transmit power allowed by the terminal device. PL is the downlink loss of the terminal device. In the communication system, especially the time division duplexing (TDD) system, it is generally believed that the uplink and downlink losses are consistent, so PL can be used to indicate the possible link loss from the terminal device to the base station side. _{PO_PSSCH_3} is the power that the terminal device expects to receive (which can also be understood as the target receive power of the terminal device), where 3 represents the base station scheduling. _{α PSSCH,3} is the filter parameter configured in the base station scheduling mode.

As shown in 3d of FIG. 3 , there is both time domain overlap and frequency domain overlap between the PSCCH and the PSSCH.

Based on the frame structure shown in FIG3, in NR V2X, PSFCH may also use different multiplexing methods with PSCCH and PSSCH. Therefore, the present application provides a power control method that can effectively solve the power control problem between PSFCH, PSCCH and PSSCH. Specifically, refer to the power control method shown in FIG5 and FIG6.

The following will take terminal device 1 and terminal device 2 in NR-V2X as an example to specifically illustrate the communication scenario of the power control method provided in an embodiment of the present application.

As shown in FIG. 4a to FIG. 4g, they are schematic diagrams of a sidelink communication scenario provided in an embodiment of the present application.

In the scenario shown in FIG. 4 a , both terminal device 1 and terminal device 2 are outside the cell coverage.

In the scenario shown in FIG. 4 b , terminal device 1 is within the coverage of the cell, and terminal device 2 is outside the coverage of the cell.

In the scenario shown in FIG. 4 c , both terminal device 1 and terminal device 2 are within the coverage of the same cell and in a public land mobile network (PLMN), such as PLMN1.

In the scenario shown in FIG. 4 d , terminal device 1 and terminal device 2 are in the same PLMN, such as PLMN1 , but are in different cell coverage areas.

In the scenario shown in FIG4e , terminal device 1 and terminal device 2 are in different PLMNs and different cells, and terminal device 1 and terminal device 2 are in the common coverage of two cells, for example, terminal device 1 is in PLMN1, and terminal device 2 is in PLMN2.

In the scenario shown in FIG. 4f , terminal device 1 and terminal device 2 are in different PLMNs and different cells respectively, and terminal device 1 is within the common coverage of the two cells, while terminal device 2 is within the coverage of the serving cell.

In the scenario shown in FIG. 4g , terminal device 1 and terminal device 2 are respectively in different PLMNs and different cells, and terminal device 1 and terminal device 2 are respectively within the coverage of their respective service cells.

It can be understood that the scenario shown above is applicable to vehicle-to-everything (V2X), which can also be called V2X.

Referring to FIG. 5 , FIG. 5 is a schematic flow chart of a power control method provided in an embodiment of the present application. The power control method can be applied to the terminal devices shown in FIG. 4a to FIG. 4g , and the power control method can also effectively solve the power control problem shown in FIG. 3 . As shown in FIG. 5 , the power control method includes:

501. A first terminal device determines a transmission power of a data channel; wherein the data channel includes first information, and the first information includes feedback information.

In an embodiment of the present application, feedback information can be sent along with the data channel, such as feedback information can be transmitted in the data channel by puncturing or rate matching. Specifically, the feedback information may include HARQ information, and the HARQ information includes acknowledgment (ACK) and negative acknowledgment (NACK), ACK is used to feedback successfully received data, and NACK is used to feedback unsuccessful reception. Optionally, the feedback information may also include reference information, and the reference information may include information between the first terminal device and the second terminal device, or the reference information may include information between the first terminal device and the network device, or the reference information may also include information between the first terminal device and the second terminal device, and information between the first terminal device and the network device. Specifically, the reference information may include any one or more of the following: reference state information such as channel state information (CSI) between the first terminal device and the second terminal device; path loss information between the first terminal device and the second terminal device; reference signal received power (RSRP); reference signal received quality (RSRQ). Of course, the above is only an example. For example, the reference information may also include information related to the distance. The information related to the distance can be understood as the distance between the first terminal device and the base station, or the distance between the first terminal device and the second terminal device, or the communication distance that the first terminal device can cover, or feedback that the first terminal device is within the coverage of the base station.

Alternatively, the feedback information may also include both HARQ information and reference information, etc. The embodiment of the present application does not impose a unique limitation on what information the feedback information specifically includes.

It can be understood that in the embodiment of the present application, the data channel can be understood as a channel used to carry the first information, and the first information may include feedback information. The specific description of the feedback information can refer to the aforementioned embodiment, and will not be described in detail here. It can be understood that the feedback information can also be specifically called sidelink feedback control information (sidelink feedback control information, SFCI) and the like, and the embodiment of the present application does not make a unique limitation on the name of the feedback information. Furthermore, the first information may also include data, that is, the data channel can also be understood as a channel used to carry data, such as the data may be data sent by the first terminal device to the second terminal device, and further, the data can be used to carry the service data sent by the first terminal device to the second terminal device. For example, in the side link, the data channel can be a physical sidelink shared channel (physical sidelink shared channel, PSSCH).

It is understandable that as for the specific method for the first terminal device to determine the transmission power of the data channel, reference may be made to the following implementation method, which will not be described in detail here.

502. The first terminal device sends the feedback information to the second terminal device using the transmission power of the data channel, and the second terminal device receives the feedback information from the first terminal device.

In an embodiment of the present application, the first terminal device may carry the feedback information in a data channel by means of puncturing, or the first terminal device may also carry the feedback information in a data channel by means of rate matching, thereby sending the feedback information through the data channel.

In an embodiment of the present application, when the time-frequency domain resources of the data channel and the feedback channel overlap, the feedback information can be sent along with the data channel. Therefore, the embodiment of the present application improves the transmission power of the data channel, making the allocation of the transmission power of the data channel in this case more accurate.

Based on the method shown in Figure 5, the following will specifically describe how the first terminal device determines the transmit power of the data channel. It is understandable that the following will take the data channel as PSSCH as an example to describe the method for the first terminal device to determine the transmit power of the data channel.

In some embodiments of the present application, the transmit power of the data channel may be determined according to the maximum transmit power, the bandwidth of the data channel, and the first adjustment parameter.

As shown in 3a and 3b of Figure 3, in this case, the transmit power of PSSCH can satisfy the following formula:

P ₁ =min{P _CMAX ,f ₁ (M ₁ )+P _O +α×PL+β} (7)

Among them, _P1 is the transmission power of the data channel, _PCMAX is the maximum transmission power, _f1 ( _M1 ) is a function of the bandwidth _M1 of the data channel, _PO is the target receiving power of the second terminal device (it can also be understood as the expected receiving power of the first terminal device), PL is the path loss estimate, α is the compensation parameter of the path loss, which can be configured by high-level signaling, and β is the first adjustment parameter. Specifically, _PCMAX can be understood as the maximum transmission power limited by the physical hardware, or it can be understood as the maximum transmission power allowed by the hardware of the terminal device. Specifically, β can be understood as a parameter related to the number of bits of HARQ, reference information, or HARQ and reference information transmitted along with the feedback information on the PSSCH. Specifically, PL can be the path loss estimate between the first terminal device and the base station, or it can be the path loss estimate between the first terminal device and the second terminal device. The embodiment of the present application does not make a unique limitation on the PL. Optionally, the PL may be predefined. For example, if the first terminal device is within the coverage of the base station, the PL may be an estimated value of the path loss between the first terminal device and the base station; and if the first terminal device is outside the coverage of the base station, the PL may be an estimated value of the path loss between the first terminal device and the second terminal device. Alternatively, the PL may also be configured by high-layer signaling or physical layer signaling, etc. The embodiment of the present application does not limit the specific value of the PL.

It can be understood that in the embodiment of the present application, the high-level signaling may include radio resource control (RRC) signaling, medium access control element (MACCE) signaling and system information block (SIB) signaling, etc., and the embodiment of the present application does not limit which high-level signaling is. Optionally, the high-level signaling can be high-level signaling under the Uu link, high-level signaling under the side link, or high-level signaling under other links in the future, etc., which is not limited in the embodiment of the present application.

Specifically, when the feedback information is SFCI, the transmit power of the PSSCH may satisfy the following formula:

P _PSSCH ＝min{P _CMAX ,10log ₁₀ (M _PSSCH )+P _O +α×PL+β _SFCI } (8)

In some embodiments, for formula (7) and formula (8), the first adjustment parameter β or β _SFCI can be determined according to the first sub-parameter Ks and the second sub-parameter BPRE (bits per resource element), the first sub-parameter is a parameter related to the modulation and coding scheme (MCS), and the second sub-parameter is a parameter related to the number of resource elements (RE) of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of feedback information. It can be understood that the specific description of other parameters in formula (8) can refer to the aforementioned embodiments, and will not be described in detail here.

Specifically, the first adjustment parameter may satisfy the following formula:

β _SFCI =10log10(2 ^BPRE×Ks -1) (9)

Among them, the first sub-parameter Ks is an adjustment parameter related to MCS, and the first sub-parameter may be indicated by a high-level signaling such as a radio resource control (RRC) signaling, etc., and is not limited in the embodiment of the present application. For the second sub-parameter BPRE, the following formula may be satisfied:

Wherein, Kr is the size of a code block (CB), r is a code block index, C is the total number of code blocks, and N _RE is the number of REs of PSSCH. That is, the second sub-parameter is a parameter related to the number of REs occupied by the data channel and the size of the code block.

Alternatively, for the second sub-parameter BPRE, the following formula may be satisfied:

Among them, O _CSI is the number of bits of feedback information such as CSI. Optionally, the OCSI can also be the sum of the number of bits of feedback information such as CSI and the number of bits of cyclic redundancy check (CRC). N _RE is the number of REs of PSSCH. That is, the second sub-parameter can also be a parameter related to the number of REs occupied by the data channel and the number of bits of feedback information.

It can be understood that the second sub-parameter shown in formula (10) can also be understood as a parameter when feedback information and data are transmitted simultaneously in the data channel. The second sub-parameter shown in formula (11) can be understood as a parameter when only feedback information is transmitted in the data channel.

It can be understood that the second sub-parameter shown in formula (10) and formula (11) is only an example. In a specific implementation, any deformation can be made according to formula (10) and formula (11). Therefore, it should not be understood as a limitation on the embodiments of the present application.

In some embodiments, for formula (7) and formula (8), the first adjustment parameter β or β _SFCI can also be determined based on the first sub-parameter Ks, the second sub-parameter BPRE and the third sub-parameter SFCI _offset , the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.

Specifically, the first adjustment parameter may satisfy the following formula:

β _SFCI =10log10[(2 ^BPRE×Ks -1)×SFCI _offset ] (12)

Among them, the first sub-parameter Ks is an adjustment parameter related to MCS, and the first sub-parameter may be indicated by a high-level signaling such as a radio resource control (RRC) signaling, etc., and is not limited in the embodiment of the present application. For the second sub-parameter BPRE, please refer to the specific description of formula (10) and formula (11), which will not be described in detail here.

Among them, when the third sub-parameter SFCI _offset transmits feedback information and data simultaneously in the data channel, the value of the third sub-parameter may be 1. When only feedback information is transmitted in the data channel, the third sub-parameter may be an offset parameter related to the number of bits of the feedback information, for example, the more bits of the feedback information, the larger the value of the third sub-parameter, or the function corresponding to the number of bits of the feedback information changes, and the change trend of the third sub-parameter may be the same as or opposite to the function corresponding to the number of bits of the feedback information.

In some embodiments of the present application, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel, and the first adjustment parameter.

In some embodiments, such as 3c in FIG. 3 , in this case, the transmit power of the data channel satisfies the following formula:

P ₁ ＝f ₂ (M ₁ +M ₂ )+min{P _CMAX ,f ₃ (M ₁ +M ₂ )+P _O +α×PL+β} (13)

Wherein, _P1 is the transmission power of the data channel, _PCMAX is the maximum transmission power, _f2 ( _M1 + _M2 ) and _f3 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel, respectively, _PO is the target receiving power of the second terminal device, PL is the estimated value of the path loss, α is the compensation parameter of the path loss, which can be configured by high-level signaling, and β is the first adjustment parameter. Specifically, _PCMAX can be understood as the maximum transmission power limited by the physical hardware, or it can be understood as the maximum transmission power allowed by the hardware of the terminal device. Specifically, β can be understood as a parameter related to the number of bits of HARQ, reference information, or HARQ and reference information transmitted along with the feedback information on the PSSCH. It can be understood that for the specific description of PL, reference can be made to the description of formula (7), which will not be described in detail here.

Specifically, the transmit power of the PSSCH may satisfy the following formula:

Optionally, formula (14) can also be transformed as follows:

Wherein, P _SSCH is the transmission power of the data channel, M _PSSCH is the bandwidth of the data channel, and M _PSCCH is the bandwidth of the control channel. It can be understood that the description of other parameters in the formula can refer to the description of the aforementioned formula, and will not be repeated here one by one.

Specifically, by comparing formula (14) and formula (15), it can be seen that f ₂ (M ₁ +M ₂ ) and f ₃ (M ₁ +M ₂ ) in formula (13) can respectively satisfy the following formulas:

It can be understood that for the specific implementation of the first adjustment parameter β or β _SFCI in formula (13), formula (14) and formula (15), reference can be made to the specific description of the aforementioned embodiments, such as reference can be made to the specific description of formula (9), formula (10), formula (11) and formula (12), which will not be described in detail here.

In some embodiments, such as 3d in FIG. 3 , in this case, the transmit power of the data channel satisfies the following formula:

P ₁ =min{P _CMAX -f ₄ (M ₁ +M ₂ ),f ₃ (M ₁ +M ₂ )+P _O +α×PL+β} (18)

Among them, _P1 is the transmission power of the data channel, _PCMAX is the maximum transmission power, _f3 ( _M1 + _M2 ) and _f4 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the data channel and the bandwidth _M2 of the control channel respectively, _PO is the target receiving power of the second terminal device, PL is the estimated value of the path loss between the first terminal device and the second terminal device, and β is the first adjustment parameter.

Specifically, the transmit power of the PSSCH may satisfy the following formula:

Among them, P _{PSSCH_actual} is the actual transmission power, that is, the actual transmission power of PSSCH determined according to the power usage; P _PSCCH is the transmission power of PSSCH when the bandwidth is M _PSSCH . For example, for 3d of Figure 3, M _PSSCH is the transmission power of PSSCH when PSCCH is not included in 3d of Figure 3, that is, M _PSSCH is the entire bandwidth of PSSCH, and is not limited to the bandwidth after removing the bandwidth of PSCCH. For example, the bandwidth may be the bandwidth represented by the arrow shown in the figure. In other words, the bandwidth can be understood as the bandwidth when PSCCH is not included in the figure. It can be understood that the meaning represented by M _PSSCH in other formulas in the embodiments of the present application will no longer be described in detail one by one.

Specifically, the formula satisfied by f ₃ (M ₁ +M ₂ ) may refer to formula (17).

f ₄ (M ₁ +M ₂ ) can satisfy the following formulas:

It can be understood that for the specific implementation of the first adjustment parameter β or β _SFCI in formula (18) and formula (19), reference can be made to the specific description of the aforementioned embodiments, such as reference can be made to the specific description of formula (9), formula (10), formula (11) and formula (12), which will not be described in detail here.

It is understandable that the above-mentioned formulas may have other variations and the like. Therefore, the formulas shown in the embodiments of the present application should not be understood as limitations on the embodiments of the present application.

Referring to FIG. 6 , FIG. 6 is a flow chart of another power control method provided in an embodiment of the present application. The power control method can be applied to the terminal devices shown in FIG. 4a to FIG. 4g , and the power control method can also effectively solve the power control problem shown in FIG. 3 . As shown in FIG. 6 , the power control method includes:

601. The first terminal device determines the transmission power of a feedback channel; wherein the feedback channel has both time domain overlap and frequency domain overlap with the data channel, or the feedback channel has frequency domain overlap and no time domain overlap with the data channel, or the feedback channel has time domain overlap and no frequency domain overlap with the data channel.

In an embodiment of the present application, the feedback channel exists alone, and the feedback channel can be used to carry feedback information. In this case, the frame structure relationship between the data channel and the feedback channel can refer to the structures shown in Figures 7 to 9. As shown in Figure 7, when the data channel and the control channel are in a time division multiplexing relationship, that is, when the data channel and the control channel have frequency domain overlap, there is both time domain overlap and frequency domain overlap between the feedback channel and the data channel. As shown in Figure 8, when the data channel and the control channel have both time domain overlap and frequency domain overlap, there is both time domain overlap and frequency domain overlap between the feedback channel and the data channel, and there is a different relationship between the feedback channel and the control channel. As shown in Figure 9, when the data channel and the control channel are in a frequency division multiplexing relationship, that is, when the data channel and the control channel have time domain overlap, the feedback channel and the data channel have frequency domain overlap, which belongs to a time division multiplexing relationship.

Therefore, the embodiments of the present application will focus on determining the transmission power of the feedback channel according to the frame structure shown in Figures 7 to 9. The specific description can be referred to the following embodiments, which will not be described in detail here.

602. The first terminal device sends feedback information to the second terminal device using the transmission power of the feedback channel, and the second terminal device receives the feedback information from the first terminal device.

In an embodiment of the present application, the feedback information may include HARQ information, and the HARQ information includes an acknowledgement (ACK) and a negative acknowledgement (NACK), ACK is used to feedback successfully received data, and NACK is used to feedback unsuccessfully received data. Optionally, the feedback information may also include reference information, and the reference information may include information between the first terminal device and the second terminal device, or the reference information may include information between the first terminal device and the network device, or the reference information may also include information between the first terminal device and the second terminal device, and information between the first terminal device and the network device. Specifically, the reference information may include any one or more of the following: reference state information between the first terminal device and the second terminal device, such as channel state information (CSI); path loss information between the first terminal device and the second terminal device; reference signal received power (RSRP); reference signal received quality (RSRQ). Of course, the above is only an example. For example, the reference information may also include information related to the distance. The information related to the distance can be understood as the distance between the first terminal device and the base station, or the distance between the first terminal device and the second terminal device, or the communication distance that the first terminal device can cover, or feedback that the first terminal device is within the coverage of the base station.

Alternatively, the feedback information may also include both HARQ information and reference information, etc. The embodiment of the present application does not impose a unique limitation on what information the feedback information specifically includes.

It can be understood that in the embodiment of the present application, the control channel can be understood as a channel for carrying sidelink control information (SCI), and the SCI may include decoding information of data transmitted in the data channel, etc. For example, in the sidelink, the control channel can be a physical sidelink control channel (PSCCH).

In an embodiment of the present application, the multiplexing method between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), such as the feedback channel may have both time domain overlap and frequency domain overlap with the data channel, the feedback channel may have frequency domain overlap but no time domain overlap with the data channel, and the feedback channel may have time domain overlap but no frequency domain overlap with the data channel. Different multiplexing methods correspond to different transmit powers, so the terminal device can determine the transmit power of the feedback channel according to one of the multiple possibilities, avoiding the use of one method to determine the transmit power of the feedback channel in all cases, thereby effectively improving the accuracy of determining the transmit power of the feedback channel and reasonably controlling the transmit power of the feedback channel.

Based on the method shown in Figure 6, the following will specifically describe how the first terminal device determines the transmit power of the feedback channel. It can be understood that the following will take the data channel as PSSCH, the control channel as PSCCH, and the feedback channel as PSFCH as an example to illustrate the method for the first terminal device to determine the transmit power of the feedback channel.

In some embodiments of the present application, the transmission power of the feedback channel is determined according to the maximum transmission power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter.

As shown in 7a and 7b in Figure 7, when PSCCH and PSSCH adopt TDM, PSFCH and PSSCH have both time domain overlap and frequency domain overlap, that is, the data channel and the feedback channel are embedded multiplexed, and the feedback channel is in the area of the data channel, that is, the time-frequency domain resources of the data channel include the time-frequency domain resources of the feedback channel. In this case, the transmission power of the feedback channel satisfies the following formula:

P ₂ ＝f ₅ (M ₁ +M ₃ )+min{P _CMAX ,f ₆ (M ₁ +M ₃ )+P _O +α×PL+Δ} (21)

Wherein, _P2 is the transmission power of the feedback channel, _PCMAX is the maximum transmission power, _f5 ( _M1 + _M3 ) and _f6 ( _M1 + _M3 ) are respectively functions of the bandwidth _M1 of the data channel, the bandwidth _M3 of the feedback channel, and the power difference between the feedback channel and the data channel (not shown in the formula), _PO is the target receiving power of the second terminal device, α is the compensation parameter of the path loss, which can be configured by high-level signaling, PL is the path loss estimation value, and Δ is the second adjustment parameter. Specifically, PL can be the path loss estimation value between the first terminal device and the base station, or the path loss estimation value between the first terminal device and the second terminal device. The embodiment of the present application does not make a unique limitation on the PL. Optionally, the PL can be predefined. As an example, if the first terminal device is within the coverage of the base station, the PL can be the path loss estimation value between the first terminal device and the base station; and if the first terminal device is outside the coverage of the base station, the PL can be the path loss estimation value between the first terminal device and the second terminal device. Alternatively, the PL may also be configured by high-layer signaling or physical layer signaling, etc. The embodiment of the present application does not limit the specific value of the PL.

Specifically, the transmission power of the feedback channel can satisfy the following formula:

Wherein, P _PSFCH is the transmission power of the feedback channel, x is the power difference between the feedback channel and the data channel, _MPSFCH is the bandwidth of the feedback channel, _MPSSCH is the bandwidth of the data channel, _MPSCCH is the bandwidth of the control channel, and Δ _format is the second adjustment parameter. The description of other parameters can refer to the specific description of formula (21). It can be understood that formula (22) can also be deformed according to the deformation method of formula (3) and formula (5), and formula (22) should not be understood as a limitation on the embodiments of the present application.

Therefore, f ₅ (M ₁ +M ₃ ) and f ₆ (M ₁ +M ₃ ) can satisfy the following formulas respectively:

f ₆ (M ₁ +M ₃ )＝10log ₁₀ (M _PSSCH +10 ^x ×M _PSFCH ) (24)

For formula (21) and formula (22), the second adjustment parameter Δ or Δ _format may be configured by high-layer signaling, or the second adjustment parameter may be predefined.

It is understandable that, since the feedback information may include HARQ, reference information, or HARQ and reference information, if the feedback information includes HARQ, the second adjustment parameter may be related to the number of bits of HARQ, if the feedback information includes reference information, the second adjustment parameter may be related to the number of bits of the reference information, and so on. It is understandable that for the specific implementation of including information in the feedback information, reference may be made to the aforementioned embodiments, which will not be described in detail here. It is understandable that the second adjustment parameter may not only be related to the number of bits of the feedback information, but also to the content included in the feedback information. For example, the value of the second adjustment parameter may be different for different feedback information. In other words, the second adjustment parameter may not only be related to the information included in the feedback information, but also to the number of bits of the information included in the feedback information. For example, the second adjustment parameter may be indicated by high-level signaling, or the second adjustment parameter may be predefined by different feedback information or the number of bits of the information included in the feedback information.

Optionally, the second adjustment parameter may also be related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel. The second adjustment parameter may satisfy the following formula:

Δ _format =10log10(2 ^BPRE×K -1) (25)

Wherein, K is a power adjustment factor, for example, different feedback information may correspond to different K, such as K may be indicated by high-layer signaling. Wherein, BPRE = O _SFCI /N _RE , where O _SFCI is the number of bits of feedback information such as HARQ, the number of bits of reference information CSI, the number of bits of other information included in the reference information, the number of bits of HARQ and CRC, the number of bits of CSI and CRC, etc., and N _RE is the number of REs occupied by PSFCH.

Furthermore, the second adjustment parameter may also be related to different modes, such as in base station scheduling mode and in contention mode, the second adjustment parameter may be different. Alternatively, the second adjustment parameter may also be different according to different transmission links, such as the second adjustment parameter in the link between the base station and the terminal device may be different from the link between the terminal device and the terminal device. It is understandable that the value of the second adjustment parameter may also be independent of the mode, or independent of the transmission link, etc., which is not limited in the embodiments of the present application.

For formula (21) to formula (24), the power difference x between the feedback channel and the data channel is predefined, or the power difference x between the feedback channel and the data channel is indicated by control information; or the power difference x between the feedback channel and the data channel is configured by high-level signaling, etc. The embodiment of the present application does not limit how to set x. Specifically, if x is predefined, x can be associated with different frame structures, which can be different according to the different frame structures shown in Figures 7 to 9. For example, x can be dynamically indicated by SCI through 1 bit or 2 bits, etc. It can be understood that the value of x can be a positive number, a negative number, or 0.

In the embodiment of the present application, in the frame structure shown in Figure 7, by setting the power difference between the feedback channel and the data channel, it is beneficial to demodulate the feedback channel. If the transmission power of the feedback channel is higher than the transmission power of the data channel, the demodulation efficiency and accuracy of the feedback channel can be effectively improved.

It can be understood that in the frame structure shown in Figure 7, as for the formula satisfied by the transmission power of the data channel and the control channel, reference can be made to the formula shown in Figure 3. The embodiment of the present application does not limit the formula or conditions satisfied by the transmission power of the data channel and the control channel shown in Figure 7.

In some embodiments, such as 8a in FIG8 , since PSFCH and PSSCH have both time domain overlap and frequency domain overlap, and are the same as the frame structure shown in FIG7 , the formula satisfied by PSFCH in 8a in FIG8 can refer to the specific implementation of FIG7 , and will not be described in detail here. Among them, whether the power difference between the data channel and the feedback channel in 8a in FIG8 is the same as the power difference between the data channel and the feedback channel in FIG7 is not limited in the embodiment of the present application. In other words, for the same parameter, different values may be taken in different figures.

It can be understood that the transmit power of the PSSCH in 8a of FIG. 8 needs to take into account the overlapping portion of the PSFCH, the PSCCH and the PSSCH. Therefore, the transmit power of the PSSCH in 8a of FIG. 8 can satisfy the following formula:

Optionally, the transmit power of the PSSCH may also satisfy the following formula:

It can be understood that for the specific implementation of the parameters in formula (26) and formula (27), reference can be made to the aforementioned implementation, and no further details will be given here. For example, for M _PSSCH in formula (26) and formula (27), the bandwidth represents the bandwidth of the entire PSSCH in 8a of Figure 8, that is, the bandwidth of the PSSCH when the figure does not include PSCCH and PSFCH. For example, the bandwidth can be the bandwidth indicated by the arrow in the figure. For example, P _{PSSCH_actual} in the formula can be the actual transmission power of the PSSCH, that is, the actual transmission power of the PSSCH determined according to the power usage, etc.

For 8b in Figure 8, in some embodiments of the present application, the transmission power of the feedback channel can also be determined based on the maximum transmission power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.

As shown in 8b of Figure 8, the time-frequency domain resources of PSFCH overlap with the time-frequency domain resources of PSSCH, and the time-domain resources of PSCCH overlap with those of PSFCH, which belongs to frequency division multiplexing. Therefore, according to the multiplexing priority rules of PSFCH, PSCCH and PSSCH, such as PSCCH>PSFCH>PSSCH, different power differences (power boosting) can be adopted. And due to the multiplexing relationship between PSFCH and PSCCH, the power difference y between PSFCH and PSCCH can be considered. It can be understood that in this case, there can also be a power difference x between PSFCH and PSSCH. For this situation, reference can be made to the aforementioned implementation method, which will not be described in detail here.

Therefore, the transmission power of the feedback channel satisfies the following formula:

P ₂ ＝f ₇ (M ₂ +M ₃ )+min{P _CMAX ,f ₈ (M ₂ +M ₃ )+P _O +α×PL+Δ} (28)

Among them, _P2 is the transmission power of the feedback channel, _PCMAX is the maximum transmission power, _f7 ( _M2 + _M3 ) and _f8 ( _M2 + _M3 ) are functions of the bandwidth _M2 of the control channel, the bandwidth _M3 of the feedback channel and the power difference between the feedback channel and the control channel, _PO is the target receiving power of the second terminal device, PL is the path loss estimation value, and Δ is the second adjustment parameter.

Specifically, the transmission power of the feedback channel can satisfy the following formula:

The power difference y between the feedback channel and the control channel is predefined, or the power difference y between the feedback channel and the control channel is indicated by control information; or the power difference y between the feedback channel and the control channel is configured by high-level signaling. It can be understood that for the specific implementation of the relevant parameters in formula (28) and formula (29), reference can be made to the implementation of the aforementioned embodiment, and no further details are given here.

Furthermore, in this case, the transmit power of PSSCH can satisfy the following formula:

Optionally, the transmit power of PSSCH may also satisfy the following formula:

It can be understood that for the specific implementation of the relevant parameters in formula (30) and formula (31), reference can be made to the implementation of the aforementioned embodiment, and no further details will be given here.

In some embodiments, as shown in 9a of FIG. 9 , since PSFCH and PSCCH use frequency division multiplexing, the transmit power of PSFCH can be determined by the power difference between PSCCH and PSFCH. Therefore, the formula satisfied by PSFCH in 9a of FIG. 9 can refer to the specific implementation of formula (28) and formula (29) shown in 8b of FIG. 8 , which will not be described in detail here. And the formula satisfied by PSFCH in 9b of FIG. 9 can also refer to the specific implementation of formula (28) and formula (29) shown in 8b of FIG. 8 . It can be understood that although there is also a power difference between PSCCH and PSFCH in FIG. 9 , whether the power difference between PSCCH and PSFCH in FIG. 9 is the same as the power difference between PSCCH and PSFCH in FIG. 8 is not limited in the embodiments of the present application.

Further, in 9b of FIG. 9 , the transmit power of the PSSCH may satisfy the following formula:

Optionally, the transmit power of PSSCH may also satisfy the following formula:

Among them, z in formula (32) and formula (33) is the power difference between PSFCH and PSSCH.

It can be understood that for the specific implementation of the relevant parameters in formula (32) and formula (33), reference can be made to the implementation of the aforementioned embodiments, and they will not be described in detail here.

It can be understood that although some parameters in the above formulas are the same, in specific implementations, different frame structures, i.e., structures corresponding to FIG7 to FIG9, may have different values for the same parameters. For example, x in FIG7 and FIG8 may have different values, and y in FIG8 and FIG9 may have different values, etc., which are not listed here one by one.

It can be understood that each of the above embodiments has its own focus, so the implementation method that is not fully described in one embodiment can refer to the implementation method in other embodiments.

It should be noted that the units of the formulas in the various embodiments shown in the present application are not described in detail. It can be understood that the unit of the transmission power of each channel in the aforementioned embodiments is dBm.

It should be noted that the bandwidth in each embodiment shown in the present application, such as the bandwidth of PSSCH, the bandwidth of PSCCH and the bandwidth of PSFCH, can be expressed in the number of resource blocks (RBs). That is, the bandwidth in each embodiment can be expressed in terms of the number of RBs.

The power control device provided in the embodiment of the present application will be introduced in detail below. The device can be used to execute the method described in the embodiment of the present application. The device can be a terminal device (such as a first terminal device), or a component in the terminal device that implements the above functions, or a chip.

Referring to FIG. 10 , FIG. 10 is a schematic diagram of the structure of a power control device provided in an embodiment of the present application. The power control device may be used to execute the method described in the embodiment of the present application. As shown in FIG. 10 , the power control device includes:

The processing unit 1001 is configured to determine a transmit power of a data channel; wherein the data channel includes first information, and the first information includes feedback information;

The sending unit 1002 is used to send the above feedback information to the second terminal device at the transmission power of the above data channel.

In an embodiment of the present application, when the time-frequency domain resources of the data channel and the feedback channel overlap, the feedback information can be sent along with the data channel. Therefore, the embodiment of the present application improves the transmission power of the data channel, making the allocation of the transmission power of the data channel in this case more accurate.

In a possible implementation manner, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel and the first adjustment parameter;

Alternatively, the transmit power of the data channel is determined according to the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.

In a possible implementation, the first adjustment parameter is determined based on a first sub-parameter and a second sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.

In a possible implementation, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, the first sub-parameter is a parameter related to the adjustment and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.

In a possible implementation, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and the network device.

In a possible implementation, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In a possible implementation, the transmission power of the above data channel satisfies the following formula:

P ₁ =min{P _CMAX ,f ₁ (M ₁ )+P _O +α×PL+β}

Among them, the above _P1 is the transmission power of the above data channel, the above _PCMAX is the above maximum transmission power, the above _f1 ( _M1 ) is a function of the bandwidth _M1 of the above data channel, the above _PO is the target receiving power of the above second terminal device, the above PL is the path loss estimation value, and the above β is the above first adjustment parameter.

In a possible implementation, the transmission power of the above data channel satisfies the following formula:

P ₁ =f ₂ (M ₁ +M ₂ )+min{P _CMAX ,f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the above-mentioned _P1 is the transmission power of the above-mentioned data channel, the above-mentioned _PCMAX is the above-mentioned maximum transmission power, the above-mentioned _f2 ( _M1 + _M2 ) and the above-mentioned _f3 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the above-mentioned data channel and the bandwidth _M2 of the above-mentioned control channel respectively, the above-mentioned _PO is the target receiving power of the above-mentioned second terminal device, the above-mentioned PL is the path loss estimation value, and the above-mentioned β is the above-mentioned first adjustment parameter.

In a possible implementation, the transmission power of the above data channel satisfies the following formula:

P ₁ =min{P _CMAX -f ₄ (M ₁ +M ₂ ),f ₃ (M ₁ +M ₂ )+P _O +α×PL+β}

Among them, the above-mentioned _P1 is the transmission power of the above-mentioned data channel, the above-mentioned _PCMAX is the above-mentioned maximum transmission power, the above-mentioned _f3 ( _M1 + _M2 ) and the above-mentioned _f4 ( _M1 + _M2 ) are functions of the bandwidth _M1 of the above-mentioned data channel and the bandwidth _M2 of the above-mentioned control channel respectively, the above-mentioned _PO is the target receiving power of the above-mentioned second terminal device, the above-mentioned PL is the path loss estimation value, and the above-mentioned β is the above-mentioned first adjustment parameter.

It should be understood that when the above-mentioned power control device is a terminal device or a component in a terminal device that implements the above-mentioned functions, the processing unit 1001 may be one or more processors, and the sending unit 1002 may be a transmitter. When the above-mentioned power control device is a chip, the processing unit 1001 may be one or more processors, and the sending unit 1002 may be an output interface. In a possible implementation, the above-mentioned power control device may also include a receiving unit. When the power control device is a terminal device or a component in a terminal device that implements the above-mentioned functions, the receiving unit (not shown in the figure) may be a receiver, or the sending unit 1002 and the receiving unit are integrated into one device, such as a transceiver. When the power control device is a chip, the receiving unit may be an input interface, or the sending unit 1002 and the receiving unit are integrated into one unit, such as an input-output interface.

In some embodiments of the present application, the power control device shown in FIG. 10 may also be used to perform the following operations:

The processing unit 1001 is configured to determine the transmit power of a feedback channel; wherein the feedback channel and the data channel have both time domain overlap and frequency domain overlap, or the feedback channel and the data channel have frequency domain overlap and no time domain overlap, or the feedback channel and the data channel have time domain overlap and no frequency domain overlap;

The sending unit 1002 is used to send feedback information to the second terminal device using the transmission power of the above-mentioned feedback channel.

In an embodiment of the present application, the multiplexing method between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), such as the feedback channel may have both time domain overlap and frequency domain overlap with the data channel, the feedback channel may have frequency domain overlap but no time domain overlap with the data channel, and the feedback channel may have time domain overlap but no frequency domain overlap with the data channel. Different multiplexing methods correspond to different transmit powers, so the terminal device can determine the transmit power of the feedback channel according to one of the multiple possibilities, avoiding the use of one method to determine the transmit power of the feedback channel in all cases, thereby effectively improving the accuracy of determining the transmit power of the feedback channel and reasonably controlling the transmit power of the feedback channel.

In a possible implementation manner, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter;

Alternatively, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.

In a possible implementation manner, the second adjustment parameter is configured by high-layer signaling, or the second adjustment parameter is predefined.

In a possible implementation manner, the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel.

In a possible implementation manner, the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or the power difference between the feedback channel and the data channel is configured by high-layer signaling;

The power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; or the power difference between the feedback channel and the control channel is configured by the high-level signaling.

In a possible implementation, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and the network device.

In a possible implementation, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal reception power, reference signal reception quality, and path loss information between the first terminal device and the second terminal device.

In a possible implementation, the transmission power of the feedback channel satisfies the following formula:

P ₂ =f ₅ (M ₁ +M ₃ )+min{P _CMAX ,f ₆ (M ₁ +M ₃ )+P _O +α×PL+Δ}

Among them, the above-mentioned _P2 is the transmission power of the above-mentioned feedback channel, the above-mentioned _PCMAX is the above-mentioned maximum transmission power, the above-mentioned _f5 ( _M1 + _M3 ) and the above-mentioned _f6 ( _M1 + _M3 ) are respectively functions of the bandwidth _M1 of the above-mentioned data channel, the bandwidth _M3 of the above-mentioned feedback channel and the power difference between the above-mentioned feedback channel and the above-mentioned data channel, the above-mentioned _PO is the target receiving power of the above-mentioned second terminal device, the above-mentioned PL is the path loss estimation value, and the above-mentioned Δ is the above-mentioned second adjustment parameter.

In a possible implementation, the transmission power of the feedback channel satisfies the following formula:

P ₂ =f ₇ (M ₂ +M ₃ )+min{P _CMAX ,f ₈ (M ₂ +M ₃ )+P _O +α×PL+Δ}

Among them, the above-mentioned _P2 is the transmission power of the above-mentioned feedback channel, the above-mentioned _PCMAX is the above-mentioned maximum transmission power, the above-mentioned _f7 ( _M2 + _M3 ) and the above-mentioned _f8 ( _M2 + _M3 ) are respectively functions of the bandwidth _M2 of the above-mentioned control channel, the bandwidth _M3 of the above-mentioned feedback channel and the power difference between the above-mentioned feedback channel and the above-mentioned control channel, the above-mentioned _PO is the target receiving power of the above-mentioned second terminal device, the above-mentioned PL is the path loss estimation value, and the above-mentioned Δ is the above-mentioned second adjustment parameter.

It can be understood that the specific implementation of the power control device shown in Figure 10 can correspond to the method implementation shown in reference Figures 5 and 6, as well as the specific implementations of formulas (7) to (33) shown in Figures 7 to 9, which will not be described in detail here.

See Figure 11, which is a schematic diagram of the structure of a terminal device 1100 provided in an embodiment of the present application. The terminal device may perform the operations of the first terminal device in the method shown in Figures 5 and 6, or the terminal device may also perform the operations of the power control device shown in Figure 10.

For ease of explanation, FIG11 only shows the main components of the terminal device. As shown in FIG11, the terminal device 1100 includes a processor, a memory, a radio frequency link, an antenna, and an input-output device. The processor is mainly used to process the communication protocol and the communication data, and to control the entire terminal device, execute the software program, and process the data of the software program, for example, to support the terminal device to execute the process described in FIG5 and FIG6. The memory is mainly used to store software programs and data. The radio frequency link is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. The terminal device 1100 may also include an input-output device, such as a touch screen, a display screen, a keyboard, etc., which are mainly used to receive data input by the user and output data to the user. It should be noted that some types of terminal devices may not have input-output devices.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the RF link. The RF link performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF link receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that, for ease of explanation, FIG. 11 shows only one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.

As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU), wherein the baseband processor is mainly used to process the communication protocol and communication data, and the CPU is mainly used to control the entire terminal device, execute the software program, and process the data of the software program. Optionally, the processor may also be a network processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. The memory may include volatile memory, such as random-access memory (RAM); the memory may also include non-volatile memory, such as flash memory, hard disk drive (HDD) or solid-state drive (SSD); the memory may also include a combination of the above types of memory.

Exemplarily, in the application embodiment, the antenna and the radio frequency link with transceiver functions can be regarded as the transceiver unit 1101 of the terminal device 1100, and the processor with processing function can be regarded as the processing unit 1102 of the terminal device 1100.

As shown in FIG11 , the terminal device 1100 may include a transceiver unit 1101 and a processing unit 1102. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc. Optionally, a device for implementing a receiving function in the transceiver unit 1101 may be regarded as a receiving unit, and a device for implementing a sending function in the transceiver unit 1101 may be regarded as a sending unit, that is, the transceiver unit 1101 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

In some embodiments, the transceiver unit 1101 and the processing unit 1102 may be integrated into one device or separated into different devices. In addition, the processor and the memory may also be integrated into one device or separated into different devices. For example, in one embodiment, the transceiver unit 1101 may be used to execute the method shown in step 502 shown in FIG. 5. For another example, in one embodiment, the transceiver unit 1101 may also be used to execute the method shown in step 602 shown in FIG. 6.

For example, in one embodiment, the processing unit 1102 can be used to control the transceiver unit 1101 to execute the method shown in step 502 shown in Figure 5, and the processing unit 1102 can also be used to control the transceiver unit 1101 to execute the method shown in step 602 shown in Figure 6.

For another example, in one embodiment, the processing unit 1102 may also be used to execute the method shown in step 501 shown in FIG. 5 and the method shown in step 601 shown in FIG. 6 .

For another example, in one embodiment, the transceiver unit 1101 may also be used to execute the method shown by the transmitter unit 1002. For another example, in one embodiment, the processor unit 1102 may also be used to execute the method shown by the processor unit 1001.

It is understandable that the implementation method of the terminal device in the embodiments of the present application can be specifically referred to the aforementioned embodiments and will not be described in detail here.

The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer storage medium. When the program is executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the power control device (including the data sending end and/or the data receiving end) of any of the above embodiments, such as a hard disk or memory of the power control device. The above computer-readable storage medium can also be an external storage device of the above power control device, such as a plug-in hard disk equipped on the above power control device, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above computer-readable storage medium can also include both the internal storage unit of the above power control device and an external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above power control device. The above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

The modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (23)

1. A power control method, characterized in that, comprising: The first terminal device determines the transmission power of the data channel; wherein, the data channel includes first information, and the first information includes feedback information; the transmission power of the data channel is based on the maximum transmission power, the bandwidth of the data channel and determining the first adjustment parameter; or, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel, the bandwidth of the control channel, and the first adjustment parameter; The first terminal device sends the feedback information to the second terminal device at the transmission power of the data channel. 2. The method according to claim 1, wherein the first adjustment parameter is determined according to the first sub-parameter and the second sub-parameter; wherein the first sub-parameter is related to the modulation and coding strategy MCS parameters, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is related to the number of REs of the data channel and the feedback information Parameters related to the number of bits. 3. The method according to claim 1, wherein the first adjustment parameter is determined according to the first sub-parameter, the second sub-parameter and the third sub-parameter; wherein, the first sub-parameter is AND modulation and A parameter related to the coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is the number of REs related to the data channel As well as a parameter related to the number of bits of the feedback information, the third sub-parameter is an offset parameter related to the number of bits of the feedback information. 4. The method according to any one of claims 1-3, wherein the feedback information includes hybrid automatic repeat request (HARQ) information, or the feedback information includes reference information, or the feedback information The information includes the HARQ information and the reference information; where the reference information includes information between the first terminal device and the second terminal device, and/or, the first terminal device and the network information between devices. 5. The method according to claim 4, wherein the reference information includes reference status information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality and One or more items of path loss information between the first terminal device and the second terminal device. 6. A power control method, characterized in that, comprising: The first terminal device determines the transmission power of the feedback channel; wherein, the feedback channel overlaps with the data channel in both the time domain and the frequency domain, or, the feedback channel overlaps the data channel in the frequency domain and has no time domain overlap, or, the feedback channel overlaps with the data channel in the time domain and has no frequency domain overlap; the transmission power of the feedback channel is based on the maximum transmission power, the bandwidth of the feedback channel, the bandwidth of the data channel, the The power difference between the feedback channel and the data channel and the second adjustment parameter are determined; or, the transmission power of the feedback channel is determined according to the maximum transmission power, the bandwidth of the feedback channel, the bandwidth of the control channel, the bandwidth of the feedback channel determining the power difference with the control channel and the second adjustment parameter; The first terminal device sends feedback information to the second terminal device at the transmit power of the feedback channel. 7. The method according to claim 6, wherein the second adjustment parameter is configured by high layer signaling, or the second adjustment parameter is predefined. 8. The method according to claim 6, wherein the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements (REs) of the feedback channel. 9. The method according to any one of claims 6-8, wherein the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel The power difference is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-level signaling; The power difference between the feedback channel and the control channel is predefined, or, the power difference between the feedback channel and the control channel is indicated by the control information; or, the feedback channel and the control channel The channel power difference is configured by the high layer signaling. 10. The method according to any one of claims 6-8, wherein the feedback information includes hybrid automatic repeat request (HARQ) information, or the feedback information includes reference information, or the feedback information The information includes the HARQ information and the reference information; where the reference information includes information between the first terminal device and the second terminal device, and/or, the first terminal device and the network information between devices. 11. The method according to claim 10, wherein the reference information includes reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality and One or more items of path loss information between the first terminal device and the second terminal device. 12. A terminal device, wherein the terminal device is used as a first terminal device, the first terminal device includes a processor, a memory, and a transceiver, and the processor is coupled to the memory; The processor is configured to determine the transmission power of the data channel; wherein, the data channel includes first information, and the first information includes feedback information; the transmission power of the data channel is based on the maximum transmission power, the data The bandwidth of the channel and the first adjustment parameter are determined; or, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter; The transceiver is coupled to the processor, and the transceiver is configured to send the feedback information to the second terminal device at the transmit power of the data channel. 13. The terminal device according to claim 12, wherein the first adjustment parameter is determined according to the first sub-parameter and the second sub-parameter; wherein, the first sub-parameter is related to the modulation and coding strategy MCS parameter, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is related to the number of REs of the data channel and the feedback Parameters related to the number of bits of information. 14. The terminal device according to claim 12, wherein the first adjustment parameter is determined according to the first sub-parameter, the second sub-parameter and the third sub-parameter; wherein the first sub-parameter is AND modulation A parameter related to the coding strategy MCS, the second sub-parameter is a parameter related to the number of resource units RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the RE of the data channel quantity and a parameter related to the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information. 15. The terminal device according to any one of claims 12-14, wherein the feedback information includes Hybrid Automatic Repeat Request (HARQ) information, or, the feedback information includes reference information, or, the The feedback information includes the HARQ information and the reference information; where the reference information includes information between the first terminal device and the second terminal device, and/or, the first terminal device and the information between network devices. 16. The terminal device according to claim 15, wherein the reference information includes reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality and one or more items of path loss information between the first terminal device and the second terminal device. 17. A terminal device, wherein the terminal device is used as a first terminal device, the first terminal device includes a processor, a memory, and a transceiver, and the processor is coupled to the memory; The processor is configured to determine the transmission power of the feedback channel; wherein, the feedback channel overlaps with the data channel in both time domain and frequency domain, or, the feedback channel overlaps with the data channel in frequency domain and There is no time domain overlap, or, the feedback channel overlaps with the data channel in the time domain and has no frequency domain overlap; the transmission power of the feedback channel is based on the maximum transmission power, the bandwidth of the feedback channel, and the bandwidth of the data channel , the power difference between the feedback channel and the data channel, and a second adjustment parameter; or, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the determining the power difference between the feedback channel and the control channel and a second adjustment parameter; The transceiver is coupled to the processor, and the transceiver is configured to send feedback information to the second terminal device at the transmit power of the feedback channel. 18. The terminal device according to claim 17, wherein the second adjustment parameter is configured by high-layer signaling, or the second adjustment parameter is predefined. 19. The terminal device according to claim 17, wherein the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements RE of the feedback channel. 20. The terminal device according to any one of claims 17-19, wherein the power difference between the feedback channel and the data channel is predefined, or, the feedback channel and the data channel The power difference between the feedback channel and the data channel is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling; The power difference between the feedback channel and the control channel is predefined, or, the power difference between the feedback channel and the control channel is indicated by the control information; or, the feedback channel and the control channel The channel power difference is configured by the high layer signaling. 21. The terminal device according to any one of claims 17-19, wherein the feedback information includes hybrid automatic repeat request (HARQ) information, or, the feedback information includes reference information, or, the The feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or, the first terminal device and the information between network devices. 22. The terminal device according to claim 21, wherein the reference information includes reference status information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality and one or more items of path loss information between the first terminal device and the second terminal device. 23. A computer-readable storage medium, characterized in that, the computer-readable storage medium stores program instructions, and when the program instructions are executed by a processor of a computer, the processor executes the process according to claims 1-11. any one of the methods described.

Images